.dropdown.dropdown-lg .dropdown-menu {
    margin-top: -1px;
    padding: 6px 20px;
}
.input-group-btn .btn-group {
    display: flex !important;
}
.btn-group .btn {
    border-radius: 0;
    margin-left: -1px;
}
.btn-group .btn:last-child {
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}
.btn-group .form-horizontal .btn[type="submit"] {
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}
.form-horizontal .form-group {
    margin-left: 0;
    margin-right: 0;
}
.form-group .form-control:last-child {
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}

@media screen and (min-width: 768px) {
    #adv-search {
        width: 500px;
        margin: 0 auto;
    }
    .dropdown.dropdown-lg {
        position: static !important;
    }
    .dropdown.dropdown-lg .dropdown-menu {
        min-width: 500px;
    }
}

.column_chat_name img {
    border-radius: 50px;
    max-width: 30px;
    max-height: 30px;
}